The USPN system is now matching texel and schr with respect to the accuracy of the current ratings.
The advantage of a Portsmouth system is that you can race dinghy's and cats at the club level.
The current issues are maintenance.. The amount of effort by volunteers to maintain the database is large and not matched by fleets who don't send in their data.
The second issue is one of class size. New classes don't generate enough portmsouth data to quickly get to a proper rating. The F16 class has not run a north americans yet. A major assumption for portmsouth to generate fair ratings is that the class is actively raced.
Texel provides a trapeeze rating and a low wind rating which is close to the USPN 4 windspeed rating system. SCHRS is a single number rating.
The challenge for all rating systems is to rate the lightweight boats.. like the A cats and F16's which fly a hull earlier then the heavy boats. For USPN... we should split Beufort 2 from Beufort 3 to account for this performance bump. For Texel..we would need to figure out how to rate the light weight boats with respect to flying a hull faster then the heavy boats.